title: Combined use of sEMG and accelerometer in hand motion classification considering forearm rotation.
abstract: Hand motion classification using surface electromyography (sEMG) has been widely studied for its applications in upper-limb prosthesis and human-machine interface etc. Pattern-recognition based control methods have many advantages, and the reported classification accuracy can meet the requirements of practical applications. However, the pattern instability of sEMG in actual use limited their real implementations, and limb position variations may be one of the potential factors. In this paper, we give a pilot study of the reverse effect of forearm rotations on hand motion classification, and the results show that the forearm rotations can substantially degrade the classifier's performance: the average intra-position error is only 2.4%, but the average interposition classification error is as high as 44.0%. To solve this problem, we use an extra accelerometer to estimate the forearm rotation angles, and the best combination of sEMG data and accelerometer outputs can reduce the average classification error to 3.3%.
authors.forename: Liang
authors.initials: L
authors.lastname: Peng
authors.forename: Zengguang
authors.initials: Z
authors.lastname: Hou
authors.forename: Yixiong
authors.initials: Y
authors.lastname: Chen
authors.forename: Weiqun
authors.initials: W
authors.lastname: Wang
authors.forename: Lina
authors.initials: L
authors.lastname: Tong
authors.forename: Pengfeng
authors.initials: P
authors.lastname: Li
mesh_terms: D061725:Accelerometry / Q000379:methods*; D000328:Adult; D001186:Artificial Limbs; D004576:Electromyography / Q000379:methods*; D005260:Female; D005542:Forearm / Q000502:physiology*; D006225:Hand; D006801:Humans; D008297:Male; D008328:Man-Machine Systems; D009068:Movement; D010865:Pilot Projects; D011474:Prosthesis Design; D015203:Reproducibility of Results; D012399:Rotation; D012815:Signal Processing, Computer-Assisted